21207212

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{439}}^1\times {\mathrm{929}}^1$

素因数の和:1385

約数の個数: 24

約数和(自身を含む): 40101600

約数和(自身を除く): 18894388

約数列:

[1, 2, 4, 13, 26, 52, 439, 878, 929, 1756, 1858, 3716, 5707, 11414, 12077, 22828, 24154, 48308, 407831, 815662, 1631324, 5301803, 10603606, 21207212]

約数ペア:

[(1, 21207212), (2, 10603606), (4, 5301803), (13, 1631324), (26, 815662), (52, 407831), (439, 48308), (878, 24154), (929, 22828), (1756, 12077), (1858, 11414), (3716, 5707)]